Sahih Bukhari Volume 8, Book 81, Hadith 6468

حَدَّثَنِي عُثْمَانُ بْنُ أَبِي شَيْبَةَ، حَدَّثَنَا جَرِيرٌ، عَنْ مَنْصُورٍ، عَنْ إِبْرَاهِيمَ، عَنْ عَلْقَمَةَ، قَالَ سَأَلْتُ أُمَّ الْمُؤْمِنِينَ عَائِشَةَ قُلْتُ يَا أُمَّ الْمُؤْمِنِينَ كَيْفَ كَانَ عَمَلُ النَّبِيِّ صلى الله عليه وسلم هَلْ كَانَ يَخُصُّ شَيْئًا مِنَ الأَيَّامِ قَالَتْ لاَ، كَانَ عَمَلُهُ دِيمَةً، وَأَيُّكُمْ يَسْتَطِيعُ مَا كَانَ النَّبِيُّ صلى الله عليه وسلم يَسْتَطِيعُ‏.‏

Narrated By 'Alqama : I asked 'Aisha, mother of the believers, "O mother of the believers! How were the deeds of the Prophet? Did he use to do extra deeds of worship on special days?" She said, "No, but his deeds were regular and constant, and who among you is able to do what the Prophet was able to do (i.e. in worshipping Allah)?"